[Sipping] Re: [Simple] MESSAGE Exploders draft

[Miguel Garcia <[e-mail]>]

Ben:

Thanks for your comments. Sorry for my late answer. See my inline comments

ext Ben Campbell wrote:

> I like this approach overall.
> 
> A couple of comments and questions. Apologies if these have already been 
> discussed.
> 
> Is it legal for the list parameter to point to something other than a 
> body part? That is, can I have external lists?

I believe this question lies in the field of the URI list draft 
(draft-camarillo-sipping-uri-list-02.txt). Section 8 of that draft has a 
discussion.


> Saying the exploder MUST NOT include the URI list in the outbound 
> messages seems a little severe. I can imagine applications where I want 
> the recipients to know the list. This could be useful for "reply to all" 
> sort of functions. But if we do allow this, we would need to give the 
> sender a way to choose, possibly on a per-URI basis. (Sort of a "cc" vs. 
> "bcc" thing.)

It seems reasonable to me. I think what we wanted to say is that the 
Request-URI of the outboud message SHOULD NOT contain a list parameter. 
The body need not carry the list, but may carry it for other purposes 
(such as the one you mentioned).


> 
> Instead of saying that message exploders must always send message 
> requests, we might consider saying the outbound request method must 
> match the outbound method. This would allow for exploders that know how 
> to explode more than one method.

No, I don't agree. In the past we got an agreement that we will create 
a message-specific exploder draft. There is a draft that says how to 
deal with INVITE, other for SUBSCRIBE, other for REFER, and this draft 
is about MESSAGE.  We don't want to go back and make the draft generic, 
to be applicable to any method. So I believe the wording is correct as 
it is now.

> 
> 
> When condidering DoS issues, it might be worth suggesting behavior if 
> the exploder finds duplicate URIs on the list. For example, I could put 
> the same URI in a bunch of times, and have a nice DoS amplifier.'

Good point. We will add a discussion on the subject.

Miguel.
> 
> 
> Miguel Garcia wrote:
> 
>>Hi:
>>
>>I have just submitted a draft that discusses a exploder of MESSAGEs.
>>
>>While it appears in the repository, you can download them from:
>>
>>http://people.nokia.net/~miguel/drafts/draft-garcia-simple-message-exploder-00.txt 
>>
>>http://people.nokia.net/~miguel/drafts/draft-garcia-simple-message-exploder-00.html 
>>
>>
>>Since this is an area covered by SIMPLE (Instant Messaging) and SIPPING 
>>(exploders), I am copying both mailing lists.
>>
>>Regards,
>>
>>     Miguel
> 
> 
> 
> 

-- 
Miguel A. Garcia           tel:[phone]
Nokia Research Center      Helsinki, Finland


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